Document Type : Translation
. (2000). . Mathematical Culture and Thought, 19(2), 57-60.
. "", Mathematical Culture and Thought, 19, 2, 2000, 57-60.
. (2000). '', Mathematical Culture and Thought, 19(2), pp. 57-60.
, "," Mathematical Culture and Thought, 19 2 (2000): 57-60,
. . An Expository Journal of the Iranian Mathematical Society. 2000;19(2):57-60 (In Persian).
